I believe it is common knowledge that Artemis have ended their commercial relationship with BIAB, is it not?
As part of that termination they might well have insisted that their logo's are removed, which effectively would mean a new paint job.
Just supposition on my part, but based on a professional knowledge of the finance industry and a certain amount of common sense. I too could find no trace of TCT on Artemis's online media presence when I searched it late 2016.
Time will tell.
A recent update on the Fakebook page suggested it was recently flying (2nd Feb) still proudly wearing the original sponsor's colours and names.
As above, I think that is old footage.